Cross-Cross Resonance Gate

The implementation of high-fidelity swapping operations is vital importance for executing quantum algorithms on a processor with limited connectivity. We present an efficient pulse-control technique, the cross-cross resonance (CCR) gate, to implement iswap and swap gates dispersively coupled fixed-frequency transmon qubits. key operation CCR gate simultaneous driving both qubits at frequency another qubit, whereby fast two-qubit interaction roughly equivalent ZX+XZ entangling realized without strongly develop calibration technique evaluate performance gates. shows remarkable improvements in average error from conventional decomposition based cross-resonance gate.3 MoreReceived 9 June 2021Accepted 19 October 2021DOI:https://doi.org/10.1103/PRXQuantum.2.040336Published by American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution this work must maintain attribution author(s) published article's title, journal citation, DOI.Published SocietyPhysics Subject Headings (PhySH)Research AreasQuantum benchmarkingQuantum computationQuantum controlQuantum gatesQuantum Information